Detailed Product Description SYRON IC Card Lock SYRON IC lock has such googd performances as larges memory capacity,, antimagnetic, antistatic, ... battery x 4Battery Life-span: about 20,000 times for IC card about 12,000 times for RF cardLow-voltage warning: When ... not be damaged when any illegal card, especially conductive metal card, is inserted into the lock. The lock can still work normally under ...